A box plot summary reports minimum 12, first quartile 50, median 62, third quartile 74, and maximum 98. What is the interquartile range?

1. The interquartile range measures the spread of the middle half of the data. 2. It subtracts the first quartile from the third quartile: IQR = 74 - 50. 3. That gives an IQR of 24. 4. Option A, 86, is the full range from maximum to minimum, a different spread measure entirely. _Source: OpenStax Introductory Business Statistics (CC BY 4.0), Ch 2 "Descriptive Statistics", section 2.2 Measures of the Location of the Data_